if (document.images) {

home_over= new Image
home_over.src = 'images/nav_home_on.gif'
home_out= new Image
home_out.src= 'images/nav_home_off.gif'

aerobatics_over= new Image
aerobatics_over.src = 'images/nav_aerobatics_on.gif'
aerobatics_out= new Image
aerobatics_out.src= 'images/nav_aerobatics_off.gif'

extra300l_over= new Image
extra300l_over.src = 'images/nav_extra300l_on.gif'
extra300l_out= new Image
extra300l_out.src= 'images/nav_extra300l_off.gif'

aboutneil_over= new Image
aboutneil_over.src = 'images/nav_aboutneil_on.gif'
aboutneil_out= new Image
aboutneil_out.src= 'images/nav_aboutneil_off.gif'

weblinks_over= new Image
weblinks_over.src = 'images/nav_weblinks_on.gif'
weblinks_out= new Image
weblinks_out.src= 'images/nav_weblinks_off.gif'

drivingdirections_over= new Image
drivingdirections_over.src = 'images/nav_drivingdirections_on.gif'
drivingdirections_out= new Image
drivingdirections_out.src= 'images/nav_drivingdirections_off.gif'

contactus_over= new Image
contactus_over.src = 'images/nav_contactus_on.gif'
contactus_out= new Image
contactus_out.src= 'images/nav_contactus_off.gif'

}

else {

home_over= " "
home_out= " "
document.home = " "

aerobatics_over= " "
aerobatics_out= " "
document.aerobatics = " "

extra300l_over= " "
extra300l_out= " "
document.extra300l = " "

aboutneil_over= " "
aboutneil_out= " "
document.aboutneil = " "

weblinks_over= " "
weblinks_out= " "
document.weblinks = " "

drivingdirections_over= " "
drivingdirections_out= " "
document.drivingdirections = " "

contactus_over= " "
contactus_out= " "
document.contactus = " "

}